Socket for electric lamps.



G. C. KNAUPP.

SOCKET FOR ELECTRIC LAMPS.

APPLICATION TILED APR. 22, 1912.

1,078,586 Patented Nov. 11, 1913.

M G C rib.

GEORGE O. KNAUFF, OF CHICAGO, ILLINOIS.

SDCKET FOR ELECTRIC LAMPS.

Application filed April 22, 1912. Serial No. 692,282.

To all whom it may concern:

Be it known that l, Gnoner. C. KNAUFF, a citizen of the United States, residing at the city of,Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Sockets for Electric Lamps, o'twhich the following 15 a pair of longitudinal grooves U.

full, clear, concise, and exact description, reference being had to the accompanying drawings, which form a part of this application.

My invention relates to the class of sock; ets having a detachable plug carrying the wire terminals.

It consists of a novel method of mounting the contact members which carry the current from the wire terminals to the lamp or other current consuming device, whereby these contact members are firmly supported but well insulated. I attain these objects, by the construction shown in the accompanying drawings, in which-- Figure l is a partial section of a socket embodying my invention. Fig. 2 is a transverse section through the socket along the line 22. Fig. 3 is a perspective view of one of the parts composing the insulating body. Fig, 4 is a transverse section showing an alternative form of insulating part. Fig. 5 is a perspective view of the same. Fig. 6 shows an elevation of the contact member used with the insulating part shown in Figs. 5 and 6.

In the drawings, A is a lamp having terminals B B at the bottom of its base.

C is a cylindrical casing, preferably of nickeled brass, having diametrically opposite slots D for engaging the ends of a projecting pin E which passes through the lamp base. Similar slots F at the otherend of the casing engage or interlock with projections G on a p ug H which carries the terminals I of the wires J.

M is an insulating body, preferably of hard rubber, fastened'within the casing (l by a pin N passing transversely through the body and the casing. The body M is made of two arts, each being half of a longi tudinan, split cylinder and each having a These grooves are so spaced that when the two parts M are assembled, the grooves will aline to form a cylindrical bore.

P P are metal cylinders of the same out side diameter as the bore just mentioned, current from the said source of current togers Q; pressed outward by a spring 5:- Each cylinder has its ends enlarged and then drawn in to fit the stem of the plunger Q, this being preferably done by spinning. the metal to the desired shape.

In assembling the socket, the two cyl inders P (with the two plunger-s and a spring mounted in each) are slipped into the grooves O of the half-body M; then the other half-body M is placed in juxtaposition and the assembled parts are slipped into the casing O and the pin N is slipped through the transverse perforation R in the half-bodies and throughcorresponding perforations in the casing C. By this method I obtain a simple and inexpensive mounting for the cylinders or current carriers which insulates them from each other and from the casing, and which efl'ectivcly prevents them from sliding lengthwise, since the space between the heads of the cylinders is made equal to the length of the split insulating body M. To prevent a leakage of current from the cylinders to the casing along the adjoining surfaces of the haltbodies, I preferably line the easing (J with a thin layer T of fiber or other insulating material.

Instead of forming enlarged heads upon the ends of the cylinders I, the latter may be made with a single enlarged portion intermediate of its, ends, as shown in Fig. 6, this enlargement interlocking with enlarged portions of the grooves in the insulating parts, as shown in Fig.

\Vhile I have illustrated the preferred form of my invention, I do not wish to be limited to the exact details shown and described, as it is obvious that numerous modifications can be made without departing from the spirit of my invention.

What 1 claim as new and desire to cover by Letters Patent is:

l. A lamp socket including a casing hav ing interlocking engagement at its opposite ends respectively with the terminals of a lamp and of a source of current; an insulating body mounted within the casing and comprising a plurality ot parts, (he said parts recessed on their adjoining surfaces longitudinal of the casing; contact members housed within the said recesses, ouch there of extending beyond the opposite ends of the insulating body and adapted to carry each cylinder having a pair of contact plunthe said lamp; each of said contact members having enlarged ends adapted to engage the ends of the insulating body to prevent longitudinal displacement of the said member with respect to the insulating body.

2. A lamp socket including a casing having interlocking engagement at its opposite ends respectively with the terminals of a lamp and of a wire-carrying plug; an insulating body mounted Within the casing and comprising a pair of semi-cylindrical parts, each of said parts having a pair of semi-cylindrical recesses upon the surface contiguous to the other part, the said recesses alining When the parts of the insulating body are mounted Within the casing to form cylindrical bores longitudinal of the casing; and a substantially cylindrical current-carrying member partially housed within each of said bores and extending beyond the ends thereof, each of said members have a pair of spring-actuated plungers mounted therein, the tips of the plungers projecting from the opposite ends of the said member into contact with the said lamp and plug respectively; there being formations upon each current-carrying member engaging portions of the said semicylindrical body parts to prevent longitudinal displacement of the said member with respect to the said insulating body.

GEORGE Ca KNAUFF.

Witnesses:

EDWARD J KNAUFF, FILLMORE W. TODD.

Copies of this'patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

